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MAX5403EUB

Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX

Maxim Integrated 

19-1934; Rev 2; 11/05

Dual 256-Tap, Low-Drift,

Digital Potentiometers in 10-µMAX

General Description

The MAX5403/MAX5404/MAX5405 is a family of dual

linear taper digital potentiometers. Each device has one

3-terminal potentiometer and one 2-terminal variable

resistor (Figure 1). The MAX5403/MAX5404/MAX5405

operate from +2.7V to +5.5V single-supply voltages

and use an ultra-low supply current of 0.1µA. These

devices also provide glitchless switching between

resistors taps as well as a convenient power-on reset

(POR) that sets the wiper to the midscale position at

power-up. The potentiometer consists of a fixed resistor

with a wiper contact that is digitally controlled through a

3-wire serial interface and has 256-tap points. It per-

forms the same function as a discrete potentiometer or

variable resistor.

These parts are ideal for applications requiring digitally

controlled resistors. Three resistance values are avail-

able: 10kΩ (MAX5403), 50kΩ (MAX5404), and 100kΩ

(MAX5405). A nominal resistor-temperature coefficient

of 35ppm/°C end-to-end and 5ppm/°C ratiometric make

the MAX5403/MAX5404/MAX5405 ideal for applications

requiring low temperature-coefficient variable resistors,

such as adjustable-gain circuit configurations.

The MAX5403/MAX5404/MAX5405 are available in a 10-

pin µMAX® package. Each device is guaranteed over the

extended industrial temperature range (-40°C to +85°C).

Applications

Mechanical Potentiometer Replacement

Low-Drift Programmable Gain Amplifier (PGA)

Volume Control

LCD Screen Adjustment

Adjustable Voltage Reference

Programmable Filters, Delays, Time Constant

Impedance Matching

SPI is a registered trademark of Motorola, Inc.

µMAX is a registered trademark of Maxim Integrated

Products, Inc.

Features

♦ 10-Pin µMAX Small Footprint Package

♦ 256-Tap Positions

♦ Ultra Low 0.1µA Supply Current

♦ +2.7V to +5.5V Single-Supply Operation

♦ Low End-To-End Temperature Coefficient:

35ppm/°C

♦ Low Ratiometric Temperature Coefficient:

5ppm/°C

♦ Power-On Reset: Wiper Goes to Midscale

(Position 128)

♦ Glitchless Switching Between Resistor Taps

♦ 3-Wire SPI™ -Interface Compatible

♦ 10kΩ/50kΩ/100kΩ Resistor Values

Ordering Information

PART

PIN-PACKAGE

R

(kΩ)

PKG

CODE

MAX5403EUB 10 µMAX

10

U10C-4

MAX5404EUB 10 µMAX

50

U10C-4

MAX5405EUB 10 µMAX

100

U10C-4

Note: All devices operate over the -40°C to +85°C temperature

range.

Pin Configuration

TOP VIEW

GND 1

LB 2

HB 3

WB 4

CS 5

MAX5403

MAX5404

MAX5405

µMAX

10 LA

9 WA

8 VDD

7 SCLK

6 DIN

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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